..When cisatracurium is used, plasma concentrations of laudanosine are lower. Further studies are needed, especially around the interactions with gamma-aminobutyric acid, opioid and nicotinic acetylcholine receptors...

The possible neuroprotective effect of laudanosine, an atracurium and cisatracurium metabolite

V FodaleActa Anaesthesiol Scand 47:780; 780-1. 2003

Potential neuroprotective properties of atracurium and cisatracurium in neurosurgical anaesthesia